Skip to product information
1 of 2

Paul Kim

Cranial nerve nuclei - posterior view (efferent) (English)

Cranial nerve nuclei - posterior view (efferent) (English)

The nuclei of origin of efferent (motor) fibers are organized into discontinuous longitudinal columns within the brainstem. The general somatic efferent nuclei lie closest to the midline and are made up of the oculomotor, trochlear, abducens and hypoglossal cranial nerve nuclei. These nuclei can also be identified from a sagittal view (see next image). The oculomotor and trochlear nuclei are located in the midbrain at the level of the superior and inferior colliculi. The abducens nucleus lies in the lower part of the pons, while the hypoglossal nucleus is situated within the lower medulla oblongata. These nuclei are composed of lower motor neurons and are responsible for innervating striated (skeletal) muscles of somatic origin, specifically the voluntary muscles of the eye and tongue. Special visceral efferent nuclei, also known as the branchial efferent or branchiomotor nuclei, are made up of the motor nucleus of the trigeminal nerve, the nucleus of the facial nerve and the nucleus ambiguus (See next image to identify these nuclei from a sagittal perspective). The motor nucleus of the trigeminal nerve and the nucleus of the facial nerve are located in the pons, while the nucleus ambiguus is situated in the medulla oblongata. The nucleus ambiguus communicates with the glossopharyngeal, vagus and accessory nerves. The special visceral efferent nuclei function to supply striated (skeletal) muscles derived from the branchial arches such as the stylopharyngeus muscle or some of the muscles of facial expression.
  • Science

    License for academic purposes such as theses, research publishing and the scientific discourse

  • Education

    License for educational purposes, live teaching, presentations, handouts and exam papers

  • Commerce

    License for commercial purposes, editorial use, broadcast and video, website and social media

  • Please visit our License page to find out which license is best for you.
  • The extended usage unlocks additional ways to use our illustrations. Check the license terms for more info.

Regular price $7.56 USD
Regular price Sale price $7.56 USD
Sale Sold out
View full details
Content type
File size
167.94 KB
2 MP